PROBLEM TO BE SOLVED: To provide a manufacturing method of a medical cap which is excellent in adhesion between an elastic plug body and an outer frame body holding its peripheral part on an inner wall, and does not cause displacement of the elastic plug body and the outer frame body by punctuation, so as to successfully secure airtightness.SOLUTION: This invention relates to the manufacturing method of the medical cap having an elastic plug body and an outer frame body which holds its side peripheral part on an inner wall, wherein a lower mold having a first ring projection part of an outside diameter smaller than a diameter of the elastic plug body and an upper mold having a second ring projection part of the outside diameter small than the diameter of the elastic plug body, are prepared, and the elastic plug body is placed on the first ring projection part of the lower mold part, and molds of the upper mold and the lower mold are closed, thereby a cavity for molding the outer frame body is formed in a state where the peripheral part of the elastic plug body is pressed from up and down by the first ring projection part and the second ring projection part, and melted resin is injected in the cavity to mold the outer frame body.COPYRIGHT: (C)2010,JPO&INPIT【課題】弾性栓体と、その周縁部を内壁で保持する外枠体との密着性に優れ、針刺しによって弾性栓体と外枠体の位置ずれがなく、密閉性の確保に優れた医療用キャップの製造方法を提供する。【解決手段】本発明の医療キャップの製造方法は、弾性栓体と、その側周部を内壁で保持する外枠体とを有する医療用キャップの製造方法であって、前記弾性栓体の直径よりも小さい外径の第1リング状突起部を有する下金型と、前記弾性栓体の直径よりも小さい外径の第2リング状突起部を有する上金型とを用意し、前記下金型の第1リング状突起部上に前記弾性栓体を載置し、前記上金型と下金型を型閉じすることにより、前記第1リング状突起部及び第2リング状突起部により前記弾性栓体の周縁部を上下から押圧した状態で、前記外枠体の成形用のキャビティを形成し、前記キャビティ内に溶融樹脂を射出して前記外枠体を成形する。【選択図】 図1
